Browse
Submit Data
Databases
API
Help

Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

161 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

Charaterization of genetic alterations and gene expression signatures found in erlotinib-resistant and erlotinib/crizotinib dual-resistant HCC827 subpopulations

ABSTRACT: The non-small cell lung cancer (NSCLC) cell line HCC827 harbors an activating EGFR mutation (exon 19 deletion) that confers sensitivity to the FDA-approved EGFR inhibitor erlotinib. By applying the ClonTracer barcoding system, we were able to show the presence of pre-existing sub-populations in HCC827 that contribute to erlotinib resistance. Prior studies implicated that MET amplification confers resistance to erlotinib in this cell line. Therefore we examined the effects of the c-Met inhibitor crizotinib on the barcoded HCC827 population when treated either sequentially or simultaneously with both inhibitors. Despite the significant reduction in barcode complexity, the erlotinib/crizotinib combination treatment failed to eradicate all of the resistant clones implying the presence of an erlotinib/crizotinib dual resistant subpopulation. We performed transcriptome profiling (RNA-seq) to elucidate the potential resistance mechanisms of the dual resistant subpopulation in comparison to vehicle-treated or single agent erlotinib-resistant HCC827 cell populations as controls. mRNA profiling of the subpopulations of human NSCLC cell line HCC827 that contribute to EGFR inhibitor erlotinib and MET inhibitor crizotinib resistance

ORGANISM(S): Homo sapiens

SUBMITTER: Joshua Korn

PROVIDER: E-GEOD-62118 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

ACCESS DATA

Json Xml

Shared Molecules

Only show the datasets with similarity scores above: 0.5

Threshold

0.5

Similar Datasets

Charaterization of genetic alterations and gene expression signatures found in erlotinib-resistant and erlotinib/crizotinib dual-resistant HCC827 subpopulations

Project description:The non-small cell lung cancer (NSCLC) cell line HCC827 harbors an activating EGFR mutation (exon 19 deletion) that confers sensitivity to the FDA-approved EGFR inhibitor erlotinib. By applying the ClonTracer barcoding system, we were able to show the presence of pre-existing sub-populations in HCC827 that contribute to erlotinib resistance. Prior studies implicated that MET amplification confers resistance to erlotinib in this cell line. Therefore we examined the effects of the c-Met inhibitor crizotinib on the barcoded HCC827 population when treated either sequentially or simultaneously with both inhibitors. Despite the significant reduction in barcode complexity, the erlotinib/crizotinib combination treatment failed to eradicate all of the resistant clones implying the presence of an erlotinib/crizotinib dual resistant subpopulation. We performed transcriptome profiling (RNA-seq) to elucidate the potential resistance mechanisms of the dual resistant subpopulation in comparison to vehicle-treated or single agent erlotinib-resistant HCC827 cell populations as controls.

2014-10-07 | GSE62118 | GEO

Microarray study to understand acquired resistance to EGFR-targeted therapy in lung cancer

Project description:Activating mutations of EGFR have been characterized as important mechanisms for carcinogenesis in a subset of EGFR-dependent non-small cell lung cancers (NSCLC). EGFR tyrosine kinase inhibitors (TKI), such as erlotinib and gefitinib, have dramatic clinical effects on EGFR-addicted lung cancers and are used as first-line therapy for EGFR-mutant tumors. However, eventually all tumors acquire secondary resistance to the drugs and progress. We established a model to better understand mechanisms of acquired resistance. NCI- HCC827 cells are EGFR-mutant and highly erlotinib-sensitive. In this study we exposed HCC827 cells to increasing concentrations of erlotinib and two highly erlotinib-resistant subclones were developed (ER3 and T15-2). In these subclones no acquired alterations of EGFR or MET were found. We hereby performed a gene expression microarray studies to understand changes that might explain mechanisms of resistance. Through these studies we demonstrated in one resistant clone (ER3) overexpression of AXL, a tyrosine kinase implicated in imatinib and lapatinib resistance. Gene expression profilings were measured in NSCLC cell line HCC827 and two erlotinib-resistant HCC827-originated sublines ER3 and T15-2.

2012-05-29 | E-GEOD-38310 | biostudies-arrayexpress

Gene expression profiling of generated Erlotinib-resistant (ER) cell lines

Project description:Targeted therapies have provided advantages to cancer patients, but these therapies are limited by differential responses and developed resistance. To discover mechanisms of resistance, we developed drug-resistant cell lines and have their gene expressions profiled and compared. HCC827 cells, which were initially sensitive to Erlotinib treatment, are subjected to Erlotinib treatment. Two clonal populations that resistant to Erlotinib resulted.

2012-06-15 | E-GEOD-38121 | biostudies-arrayexpress

Axl mediates acquired resistance of head and neck cancer cells to the epidermal growth factor receptor inhibitor erlotinib

Project description:Elevated expression and activity of the epidermal growth factor receptor (EGFR) is associated with development and progression of head and neck cancer (HNC) and a poor prognosis. Clinical trials with EGFR tyrosine kinase inhibitors (TKIs; eg. erlotinib) have been disappointing in HNC. To investigate the mechanisms mediating resistance to these agents, we developed a HNC cell line (HN5-ER) with acquired erlotinib resistance. In contrast to parental HN5 HNC cells, HN5-ER cells exhibited an epithelial-mesenchymal (EMT) phenotype with increased migratory potential, reduced E-cadherin and epithelial-associated miRNAs, and elevated vimentin expression. Phosphorylated RTK profiling identified Axl activation in HN5-ER cells. Growth and migration of HN5-ER cells was blocked with a specific Axl inhibitor, R428, and R428 re-sensitized HN5-ER cells to erlotinib. Microarray analysis of HN5-ER cells confirmed the EMT phenotype associated with acquired erlotinib resistance, and identified activation of gene expression associated with cell migration and inflammation pathways. Moreover, increased expression and secretion of interleukin (IL)-6 and IL-8 in HN5-ER cells suggested a role for inflammatory cytokine signaling in EMT and erlotinib resistance. Expression of the tumor suppressor miR-34a was reduced in HN5-ER cells and increasing its expression abrogated Axl expression and reversed erlotinib resistance. Finally, analysis of 302 HNC patients revealed that high tumor Axl mRNA expression was associated with poorer survival (HR 1.66, p=0.007). In summary, our results identify Axl as a key mediator of acquired erlotinib resistance in HNC and suggest that therapeutic inhibition of Axl by small molecule drugs or specific miRNAs might overcome anti-EGFR therapy resistance. Differential gene expression between parental and acquired erlotinib resistant head and neck cancer cell lines of HN5.

2013-08-10 | E-GEOD-49135 | biostudies-arrayexpress

SILAC-based quantitative tyrosine phosphoproteomic profiling identifies alternative therapeutic targets to erlotinib in head and neck squamous cell carcinoma

Project description:Epidermal growth factor receptor (EGFR), a receptor tyrosine kinase is overexpressed in 90% of Head and neck squamous cell carcinoma (HNSCC) patients. Clinical trials with EGFR-targeted tyrosine kinase inhibitors such as erlotinib have shown a modest activity in HNSCC alternate mechanisms of resistance are acquired. To investigate these acquired mechanisms of resistance and identify novel therapeutic targets we employed SILAC-based tyrosine phosphoteomic analysis of an isogenic pair of erlotinib sensitive (SCC-S) and resistant (SCC-R) HNSCC cell line. Quantitative phosphotyrosine profiling revealed 98 phosphopeptides belonging to 64 proteins and 66 phosphopeptides belonging to 52 proteins to be hyper and hypophosphorylated (≥2 fold) in SCC-R cells, respectively. Several proteins such MET proto-oncogene, receptor tyrosine kinase (MET) and CRK like proto-oncogene, adaptor protein (CRKL) known to mediate erlotinib resistance in HNSCC and lung cancer were found to be dysregulated. Bioinformatics analysis of differentially phosphorylated proteins showed enrichment of proteins involved in focal adhesion kinase (FAK) pathway downstream of EGFR. We identified and validated activation of several phosphorylation sites of protein tyrosine kinase 2 (PTK2) in SCC-R cells and its downstream targets. We further demonstrated that CUB-domain containing protein 1 (CDCP1), an upstream regulator of PTK2 activity and PTK2 can be targeted in combination as an alternative to erlotinib in HNSCC.

2022-10-13 | PXD007769 | Pride

Microarray study to understand acquired resistance to EGFR-targeted therapy in lung cancer

2012-05-30 | GSE38310 | GEO

Gene expression profiling of Erlotinib sensitive and resistant human non small cell lung cancer (NSCLC) cell lines

Project description:We characterized the gene expression profile of Epithelial Growth Factor Receptor (EGFR) inhibitor (Erlotinib)-sensitive and resistant human NSCLC cell lines. Total RNA was extracted from the cell lines and expression profiles were studied by Agilent microarray analysis. Wide changes in gene expression profiles occur in the Erlotinib-resistant cell lines when compared with their parental cell lines (HCC827 and HCC4006).

2017-09-23 | GSE80344 | GEO

Whole transcriptome analysis of erlotinib treatment in EGFR-mutant cells

Project description:We were interested in characterizing the transcriptional changes that occur on a genome-wide scale following treatment of EGFR-mutant lung cancer cells with targeted therapies. HCC827 human lung cancer cells harboring an amplified EGFR allele with an activating in frame deletion of 15 nucleotides in exon 19 were treated in triplicate with 1uM erlotinib (EGFR inhibitor), AZD-6244 (MEK inhibitor) or BEZ-235 (PI3-Kinase/mTOR inhibitor) for 6 hours, followed by total mRNA isolation and whole transcriptome analysis using Affymetrix U133 Plus 2.0 expression arrays.

2015-02-25 | E-GEOD-51212 | biostudies-arrayexpress

SILAC-based proteomic approach to delineate molecular alterations associated with erlotinib resistance in head and neck squamous cell carcinoma

Project description:Although Epidermal growth factor receptor (EGFR) is overexpressed in 90% of Head and neck squamous cell carcinoma (HNSCC) patients. Clinical trials with EGFR-targeted small molecule inhibitors such as erlotinib have shown a modest activity in recurrent or advanced HNSCC. To investigate the acquired mechanisms of erlotinib resistance we employed SILAC-based total proteomic analysis of an isogenic pair of erlotinib sensitive (SCC-S) and resistant (SCC-R) HNSCC cell line. This resulted in the identification of 5,427 proteins of which 532 proteins were overexpressed and 527 proteins were downregulated in SCC-R cells as compared to SCC-S cells (≥2 fold). Several proteins known to mediate erlotinib resistance in HNSCC and lung cancer were found to be dysregulated. Bioinformatics analysis of differentially expressed proteins showed enrichment of proteins involved in focal adhesion kinase (FAK) pathway downstream of EGFR. We identified CUB-domain containing protein 1 (CDCP1) and integrin β1 as upstream regulators of FAK signalling pathway to be overexpressed. We further demonstrated that CDCP1 and FAK can be targeted in combination as an alternative to erlotinib in HNSCC.

2019-12-18 | PXD007768 | Pride

RNA sequencing of PC9 and four erlotinib-persister cells derived from PC9

Project description:Given the recent reports on the role of AXL in mediating resistance to EGFR-targeted therapy, we generated cell line models of Erlotinib-resistance to investigate the effect of AXL inhibitors on EGFR TKI resistance. For this, EGFR-mutant PC9 cells were passed through a persister bottleneck by applying strong drug selection pressure to generate drug-tolerant erlotinib persister cells. We created four Erlotinib-resistant clones from one parental population; S1-34, S2-10, S2-17 and S2-30. Whole exome and RNA sequencing analyses were performed to probe the differences in Erlotinib-resistance mechanisms present in these persister-derived Erlotinib-resistant cells.

2022-04-13 | GSE191185 | GEO

OmicsDI is part of the ELIXIR infrastructure

OmicsDI is an Elixir interoperability service. Learn more ›

Tweets

OmicsDI Databases

PRIDE
PeptideAtlas
MassIVE
JPOST Repository
Physiome Model Repository

EGA
EVA
ENA
LINCS
PAXDB
Cell Collective

MetaboLights
Metabolomics Workbench
MetabolomeExpress
GNPS
BioModels
FAIRDOMHub

ArrayExpress
dbGaP
ExpressionAtlas
GEO
NODE

Information

Databases
Help
API
Contact us
Code on GitHub
Terms of use
Submit Data